HDOJ 1002 JAVA

import java.util.*;
import java.math.*;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n;
        n=sc.nextInt();
        for(int i=1;i<=n;i++) {
            BigInteger a=sc.nextBigInteger();
            BigInteger b=sc.nextBigInteger();
            
            System.out.println("Case "+ i + ":");
            System.out.print(a + " + " + b + " = ");
            System.out.println(a.add(b));
            if(i!=n) {
                System.out.println();
            }
        }
        
        }  
    }